US3798523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single phase induction motor brake
Assignee: Individual
•
Filing: 1972-03-07
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Granted: 1974-03-19
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Expires: 1992-03-07
Abstract
Abstract The capacitor in a single phase induction motor is used as a current limiting impedance in a DC braking circuit. The circuit includes the AC source, the capacitor, a rectifier and a field winding.
Inventors
- 👤 T Gross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:25
CPC Classifications
H; H02; H02P; H02P3/00; H02P3/06; H02P3/18; H02P3/24
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
107 words
In an AC energized capacitor start induction motor having start and run windings, a capacitor, means adapted to connect said capacitor in series with said start windings during starting of said motor, a circuit for braking said motor to stop the same comprising a rectifier, said run windings and said capacitor, and means for disconnecting said capacitor from the start windings and connecting said capacitor into said braking circuit, the connection of said capacitor to said rectifier providing a current limiting impedance, and means to connect said run windings to said rectifier thereby to supply DC to said run windings which commence braking action on said motor.
Claim 2
Dependent Claim
107 words
In an AC energized capacitor start induction motor having start and run windings, a capacitor, means adapted to connect said capacitor in series with said start windings during starting of said motor, a circuit for braking said motor to stop the same comprising a rectifier, said run windings and said capacitor, and means for disconnecting said capacitor from the start windings and connecting said capacitor into said braking circuit, the connection of said capacitor to said rectifier providing a current limiting impedance, and means to connect said run windings to said rectifier thereby to supply DC to said run windings which commence braking action on said motor.
Claim 3
Dependent Claim
16 words
The braking circuit as defined in claim 1 wherein the said rectifier is a full-wave rectifier.
Claim 4
Dependent Claim
21 words
The braking circuit as defined in claim 1 wherein the rectifier is a diode connected in parallel with said run windings.
Claim 5
Dependent Claim
22 words
The braking circuit as defined in claim 1 wherein the rectifier is connected to both the start and run windings during braking.
Claim 6
Dependent Claim
26 words
The braking circuit defined by claim 1 wherein said capacitor comprises a plurality of condensers, with means to connect the same in series or in parallel.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |